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Interstate 75 W (RP2350) - RGB LED Matrix Driver
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An all-in-one, RP2350 powered controller for HUB75 LED matrix panels. Interstate 75 W is a RP2350-based driver board for HUB75-style LED matrices - they're ...
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An all-in-one, RP2350 powered controller for HUB75 LED matrix panels.
Interstate 75 W is a RP2350-based driver board for HUB75-style LED matrices - they're the chainable LED panels that you sometimes see making up video walls or big advertising displays. It's designed to plug neatly into the back of a LED panel, and it provides a quick and easy way to whip up some scrolling signage or an eye-catching LED display for sensor outputs. I75 W has wireless connectivity so you can also use it to display information from the internet! 🌎
It's powered via USB-C, which should also be able to power a few connected panels happily, assuming you're not planning anything too eye-bleedingly bright. It has three handy user buttons (A, B and BOOT) and an onboard RGB LED.
We've also popped a Qw/ST connector on there, to make it super easy to plug in Qwiic or STEMMA QT breakouts.
Here are some things you could do!
🚌 Tap into an API and display bus times, plane tracking or traffic info.
📈 Generate a big bold graph showing air quality or other sensor readings.
💡 Create some ad hoc, easily adjustable signage for your classroom, maker stall or kebab shop.
💾 Scroll greetz to your crew, just like in the old days:
"`-._,-'"`-._,-' HACKED AND PACKED BY PIMORONI "`-._,-'"`-._,-'
What's in the Starter Kit?
You can buy an I75 W on its own, or as part of a Starter Kit that includes LED panels to make a big square 128 x 128 (32 x 32cm) or rectangular 256 x 64 (64 x 16cm) display. The Starter Kit includes:
- Interstate 75 W (RP2350)
- 2x 128x64 RGB LED matrix panels
- Power and data cables to connect up the panels
- 8x magnetic feet with screw threads
- A nice long USB cable
Features
- Powered by RP2350A (Dual Arm Cortex M33 running at up to 150MHz with 520KB of SRAM)
- 4MB of QSPI flash supporting XiP
- Raspberry Pi RM2 module (CYW43439), supporting IEEE 802.11 b/g/n wireless LAN, and Bluetooth
- Compatible with our 32x32, 32x64, 64x64 and 128x64 LED matrices.
- Sturdy screw terminals for powering the LED panels
- USB-C connector for programming and power
- Two user buttons (labelled A and B)
- Reset and boot buttons (the boot button can also be used as a user button)
- RGB LED
- Qw/ST (Qwiic/STEMMA QT) connector
- Comes fully-assembled (no soldering required)
- Programmable with C/C++ or MicroPython
Pinout and Schematic
Getting Started
You can find the most recent version of the MicroPython firmware and examples at the link below:
Connecting Breakouts
I75 W has a Qw/ST (AKA Qwiic/STEMMA QT) connector, so you can connect up Qw/ST breakouts easily using a JST-SH to JST-SH cable.
Jargon buster
Plain-language definitions for the technical terms used above.
- API
- An API is a software interface that lets a program control hardware or features provided by the operating system. In this product, API support matters if you want your software to adjust display settings such as brightness or contrast automatically.
- HUB75
- HUB75 is a common connector and signalling standard used by many RGB LED matrix panels. If a controller supports HUB75, it can plug into compatible matrix panels without custom wiring, but you still need to match the panel size and power requirements.
- LED
- A light-emitting diode is a small electronic component that lights up when current flows through it in the correct direction. In this kit, LEDs create the flashing effect, so polarity and correct soldering matter for the project to work.
- MicroPython
- A version of the Python programming language made to run on microcontrollers. It matters because it lets beginners write readable code to control LEDs, sensors, motors and displays without needing to start with lower-level languages.
- Qwiic
- Qwiic is a plug-in connector system for I2C devices that uses small 4-pin cables, so you can connect compatible sensors without soldering. It matters because your controller or adapter also needs Qwiic, or you will need a cable or breakout to wire it up.
- RGB
- Short for red, green and blue, usually referring to an LED that can mix those three colours. It matters because controlling an RGB LED teaches how separate outputs combine to create different colours.
- RP2350
- A microcontroller chip from Raspberry Pi used as the main processor on some development boards. Knowing the board is built around an RP2350 helps you check software support, pin capabilities and whether it suits MicroPython projects.
- SRAM
- Fast temporary memory used by a processor while a program is running. More SRAM helps with projects that handle larger data buffers, networking, displays, or more complex code.
- STEMMA
- A plug-and-cable connection system used on some maker electronics boards to make wiring simpler. If a product uses STEMMA, you need the matching cable or connector type to plug it in without soldering.
- STEMMA QT
- A small plug-in connector system for I2C boards that lets you connect compatible sensors and controllers without soldering. It matters because it can make wiring faster and less error-prone, especially when adding several small modules to a project.
- USB-C
- A modern reversible USB connector used for power and data connections. On this product it matters because it can connect directly to a computer as well as to a microcontroller project.
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